The statement Viruses do not respond to stimuli is true because they are entities incapable of responding to environmental factors.
What are the features of viruses?The features of viruses include they require a host cell to replicate, cannot carry out their metabolic functions and they do not react to environmental cues such as occurs with other organisms, given bacteria capable of surviving indefinitely in absence of hosts or any other type of organism.
Therefore, with this data, we can see that viruses need a host cell to replicate and they cannot carry out metabolic activities.
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The lab report should begin with one or two sentences that state the purpose of the investigation—what you want to see, practice, learn about, or test. The purpose statement answers the question “What are you trying to find out by doing this experiment?”
The three most common types of labs are:
inquiry labs: you measure how changing one variable affects another variable
discovery lab: you see a scientific phenomenon—perhaps for the first time.
forensic lab: you gather and analyze data as evidence to build an argument in response to a question, as in a court case.
All three types of labs give you an opportunity to learn important scientific skills and concepts.
A possible purpose for an inquiry lab would be "To analyze the effect of calcium on plants' growth rate".
What is a purpose statement?In an experiment, the purpose statement briefly but clearly defines the objective of an experiment. Due to this, most purpose statements start with words such as:
AnalyzeIdentifyDetermineObserve MeasureWhat would be a possible purpose statement?In the case of an inquiry lab, which is a very common type, an example of a purpose statement would be A possible purpose for an inquiry lab would be "To analyze the effect of calcium on plants' growth rate".
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How many times a day should I feed solids to my 6 month old?
From 6-8 months old, feed your child a portion of a cup of delicate food a few times each day. Your child can eat anything with the exception of honey, which she shouldn't eat until she is a year old.
Babies ordinarily need to eat each 2-3 hours, five to multiple times during the day. It is typical for a child's timetable to change from one day to another, or for infants to eat various measures of food every day. Parental figures can follow a child's prompts, regardless of whether they have laid out a timetable now.
Be that as it may, what happens when your child begins eating strong food: is it conceivable to overload him? The short response is: indeed, on the off chance that you disregard his signals and are not offering the right food varieties. This is an acceptable exhortation en route to forestall overloading your child: Post for prompts and quit taking care of your child when he is full.
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The two strands of a DNA molecule are joined to each other through _____.
hydrogen bonds between nucleotide bases. Adenine and thymine form hydrogen bonds with each other, while cytosine and guanine form hydrogen bonds with each other, holding the two strands together.
DNA bases join up to create units called base pairs, for as A with T and C with G. Additionally, a sugar and phosphate molecule are joined to each base. A nucleotide is a grouping of bases, sugars, and phosphates. The double helix, which is formed by two long strands of nucleotides, is a spiral. The bases form chemical bonds with one another, adenine with thymine and cytosine with guanine, which bind the two strands together. Biological information, such as the directions for constructing a protein or RNA molecule, is encoded in the base sequence along the backbone of DNA.
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Take a second and use the information given about the starting conditions to fill in the values for total body solute, volume, and osmolarity.
If the body is 3L and the osmolarity is 300 mOsM how much solute do you have?
body have an osmolarity-solvent/volume solution of 300=x/3 x=900.
The amount of impermeant molecule in a solution determines its osmolarity, not the type of molecules it contains.
The following equation can be used to determine the osmolarity of samples containing just one kind of solute, such as just glucose or even just sodium chloride:
Osmolarity is calculated as follows: molarity x n x f.
Osmolality regulation. The plasma osmolality is closely controlled and kept between 28 and 95 mOsm/kg. Modifying water intake or excretion helps to keep the plasma osmolality within normal range.
The simplest and most accurate formula to determine plasma osmolality is Posm = 2 [Na(+)]+glucose (mg/dL)/18+BUN (mg/dL)/2.8. Effective osmolality and tonicity is determined by the concentration only of effective osmoles and is expressed as Eosm = 2 [Na(+)]+glucose/18. Plasma tonicity should be between 275-295mOsm/kg of water.body have an osmolarity-solvent/volume solution of 300=x/3 x=900.
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which type of membrane protein would likely be most easily removed in a laboratory experiment?
Answer: Peripheral Proteins
Explanation: Peripheral proteins are easily removable from the membrane in a laboratory experiment by changing the pH or increasing the salt concentration of a given solution
What does a white marker with an orange crossed diamond and black lettering mean?
Answer:
boats must keep out of the area
Explanation:
Black lettering on the buoy or sign gives the reason for the restriction, for example, SWIM AREA. Danger: A white buoy or sign with an orange diamond warns boaters of danger – rocks, dams, rapids, etc.
what happens to mRNA after it completes transcription?
Answer: After the transcription of DNA to mRNA is complete, translation — or the reading of these mRNAs to make proteins — begins.
Explanation: research
In the ear, the process of transduction occurs in theO auditory cortexO outer earO eardum
In the ear, the process of transduction occurs in the cochlea, which is located in the inner ear.
Auditory transduction starts by converting sound pressure waves into mechanical vibrations of the eardrum and ossicles. These vibrations get transmitted through the middle ear to the cochlea, where they are converted into electrical signals by hair cells.
The inner ear's cochlea is where vibrations are transformed into nerve impulses that are then delivered to the brain. It is also known as the organ of hearing. The cochlea is a small conical structure resembling a snail shell.The function of cochlea:
The inner ear contains a hollow spiral-shaped bone called the cochlea, which is essential to hearing and takes part in auditory transduction. Electrical impulses are converted from sound waves into distinct sound frequencies by the brain.Therefore, the process of transduction occurs in the cochlea, which is located in the inner ear.
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what is the purpose of the iris?
In the vertical plane at the forefront of the eye, at the front of the lens, is a round, colorful structure known as the iris. Its middle is unbound to enable the pupil to enlarge or decrease.
What does the eye's pupil look like?
Pupillae, singular. Light can reach the retina because of the pupil, a black hole in the centre of the the eye's iris. The reason it seems black is that light rays reaching the pupil either are directly absorbed by the cells within the eye or indirectly absorbed following diffuse reflection within the eye which primarily miss exiting the small pupil.
An easy pupil exam is what?
Student testing. An eye specialist or an aid will examine your pupils and look at your retinas during a standard eye exam.
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a certain gene tends to accumulate mutations at an average rate of about 1 nucleotide base pair per 5 million years over the course of time in a lineage. how many mutations is a given line of descent expected to accumulate compared to the ancestor over 25 million years of evolution?
For the certain gene over 25 million years the number of mutations will be 5.
Mutations are defined as the changes in the nucleotide sequence of DNA. The changes can be limited to 1-base pair or include multiple base pairs . The process can be deletion , addition , amplification , and recombination. The rate of mutation is the probability that a unit length of DNA mutates with time . The rate of mutation in organisms or cells is determined by fluctuations analysis or by mutation accumulation assays . The rate of mutation of bacteria can not be determined based on the number of directly resistance organisms. To overcome this Luria and Delbruck invented fluctuation analysis. Now we have one mutation per 5 million year therefore the rate of the mutation will be 1/5(1 mutation / 5 million year). So therefore for 25 million years the number of mutations is equals to (1 mutation/ 5 million years) × 25 million years = 5 mutations.
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What are three differences between Gram-positive and gram-negative cells?
The three differences between Gram-positive and gram-negative cells are as follow.
Gram-positive bacteria are characterized by a thick peptidoglycan subcaste in their cell walls, while gram-negative cells have a thin peptidoglycan subcaste. This difference affects the cell’s capability to take up colorings during the Gram staining procedure, therefore the name. Gram-positive cells are also generally lower than gram-negative cells, The difference in peptidoglycan layers also affects the cell’s permeability. Gram-positive cell walls are more passable than gram-negative cell walls, making them more susceptible to antibiotics. Gram-negative cells also have an fresh subcaste, the external membrane, that helps cover them from antibiotics. Incipiently, gram-positive cells generally contain less inheritable material than gram-negative cells. Gram-positive cells have indirect genomes, while gram-negative cells have direct genomes, allowing them to contain further inheritable material.To know more about Gram-positive bacteria visit:
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which of the following correctly describes the structural organization of the cell membrane? group of answer choices a solid, rigid layer of phospholipid with loosely bound protein molecules a bilayer of phospholipid molecules in which protein molecules are embedded and can move a protein bilayer with lipids embedded in a different pattern in different cell types. three layers; lipid on the inside, protein in the middle, and carbohydrates (and polysaccharides) on the outside rigid layers of protein molecules in which carbohydrate molecules are suspended
The Correct option is B; A bilayer of phospholipid molecules in which protein molecules are embedded and can move .
The phospholipid bilayer, which creates a durable barrier between two aqueous compartments, is the membrane's fundamental structure.
Cell membrane refers to the membrane that surrounds the cell. Only particular molecules or ions can flow through it. As a result, it is known as a selectively permeable membrane. Depending on the conditions inside or outside the cell, the cell membrane can also prevent some molecules from passing through.
As a result, the cell membrane serves two functions: first, as a barrier that keeps cell constituents in and undesired things out, and second, as a gate that allows vital nutrients into the cell and waste products out.
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Full Question ;
Which of the following correctly describes the structural organization of the cell membrane?
A. A solid, rigid layer of phospholipid with loosely bound protein molecules
B. A bilayer of phospholipid molecules in which protein molecules are embedded and can move
C. Rigid layers of protein molecules in which carbohydrate molecules are suspended D. Three layers; lipid on the inside, protein in the middle, and carbohydrates (and polysaccharides) on the outside
E. A protein bilayer with lipids embedded in a different pattern in different cell types.
Name the class of nutrients that is made up of chains of amino acids.
Chains of amino acids make up proteins.
These amino acids are arranged in a long chain and joined to one another by covalent peptide bonds to form proteins. Polypeptides are another name for proteins. The sequence of amino acids in every type of protein is distinct and identical from one molecule to the next. There are countless varieties of proteins, each with a unique amino acid sequence.
Peptide link:- This covalent connection is created when the carbon atom from one amino acid's carboxyl group shares electrons with the nitrogen atom (blue) from another amino acid's amino group. As seen, this condensation results in the loss of one water molecule.
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The _______________ period is the first phase, and is the time from initial contact with the infectious agent to the appearance of the first symptoms.
The incubation period is the first phase, and is the time from initial contact with the infectious agent to the appearance of the first symptoms.
In this period, the disease is asymptomatic although the pathogens are present in our body invading the primary immune system.
What is incubation period?The incubation period is the time period between the exposure of the pathogen to the body and the appearance of the initial symptoms of the disease.
What are pathogens?These are microorganisms that cause disease.
What is primary immune system?The defense system which displayed upon the first contact of the immune system with an infectious agent or pathogen is the primary immune system.
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which systems are involved with the breakdown and delivery of nutrients from recently eaten foods to the cells and the removal of waste materials from the body?
Answer: The digestive system breaks down recently eaten food and removes solid waste (feces) from the body. The circulatory system transports nutrients to different parts of the body. The excretory system removes waste from the body.
Explanation: I already explained it in the answer.
If potassium-40 goes through 3 half lives how many years have gone by and what percentage of the original mass would remain ?
Potassium-40 have gone by 3.75 billion years and percentage of the original mass would remain at 12.5 %
From the question we have following information :
Potassium-40 goes through 3 half lives
Half life potassium-40 is 1.25 billion years.
If potassium-40 undergoes 3 half-lives, it would have undergone 3 decay events, meaning the original amount of potassium-40 would have reduced to 1/2 * 1/2 * 1/2 = 1/8 of its original amount.
3 half-lives would mean 3 * 1.25 billion years = 3.75 billion years have gone by.
In terms of the percentage of the original mass that would remain, it would be 1/8 * 100 = 12.5%.
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identify the parts of the nervous system that sense and communicate knee soreness so a person knows to stop running and rest.
Peripheral somatic nervous sense and communicate knee soreness so a person knows to stop running and rest.
A division of your peripheral nervous system that permeates almost every aspect of your body is the somatic nervous system. Your brain receives information from your senses through this system's nerves. Additionally, they allow you to move about by sending orders from your brain to your muscles.
Processing and integrating the information from the many sources so that we can formulate a reaction is done by the brain and spinal cord. Therefore, the primary role of the somatic nervous system is to link the central nervous system (CNS) with organs and striated muscle to carry out our daily activities.
Your somatic nervous system enables you to move and regulate the muscles in every part of your body. Additionally, it delivers data from your four senses—smell, hearing, taste, and touch—into your brain.
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approximately what is the probability of randomly selecting a child whose height is more than 71 inches
Probability is a measure of how likely it is that something will happen, expressed as a number between 0 and 1. In this context, we're going to look at the probability of randomly selecting a child whose height is more than 71 inches.
To find the probability of this event, we need to know the total number of children and the number of children who are taller than 71 inches. Let's say we have 100 children and 10 of them are taller than 71 inches. This means that the probability of selecting a child taller than 71 inches is 10/100 or 0.1. This can also be expressed as a percentage: 10%.
It means that if we randomly select one child from the group of 100, there is a 10% chance that the child will be taller than 71 inches. This is a rough estimate and may not be 100% accurate, but it gives us an idea of the likelihood of this event.
It's important to note that probability is not the same as certainty. Even though the probability of selecting a child taller than 71 inches is 0.1 or 10%, it doesn't mean that every time we randomly select a child, it will be taller than 71 inches. This is because the probability is a measure of likelihood, not certainty.
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White-tailed deer are seasonal breeders. Female white-tailed deer begin their reproductive cycle in the fall. Rising testosterone levels in male white-tailed deer cause them to start their breeding season around the same time. Offspring are born the following spring and summer. What is the most likely explanation for white-tailed deer having a seasonal breeding cycle instead of a monthly breeding cycle like many domesticated animals?
answer choices
O Male and female deer come into contact with each other only in the fall
O Large predators are not found in deer habitats during the spring and summer months
O Giving birth only in the spring and summer ensures that offspring are born when food is most available
O Deer give birth in the spring and summer in order to avoid being pregnant during the hot summer months.
Only giving birth in the spring and summer guarantees that the young are born when there is the greatest supply of food. the most plausible explanation for white-tailed deer mating cycles, which are seasonal rather than monthly like many domestic animals.
The seasonal mating cycle of white-tailed deer serves to guarantee that young are born when food is most plentiful, which is the most plausible reason for it. The food supply in the locations where white-tailed deer reside can fluctuate significantly from season to season. The moms may give birth to their children at a time when food is plentiful by only giving birth in the spring and summer. The chances of the children surviving and flourishing are increased as a result. The seasonal breeding cycle also gives moms enough time to recuperate from childbirth prior to the arrival of winter and the ensuing decline in food supply.
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which information flow is disrupted when diabetes destroys insulin-producing cells? which information flow is disrupted when diabetes destroys insulin-producing cells? the pancreas is unable to produce enzymes to break down proteins. the body is unable to respond to signals that indicate the amount of glucose in the blood. appetite signals no longer regulate feeding. cells in the bladder are no longer able to send signals when the bladder fills.
When diabetes destroys insulin-producing cells, the body is unable to send signals that indicate the amount of sugar in the blood.
Thus, B is the correct option.
Insulin is а hormone produced in the pаncreаs by speciаl cells, cаlled betа cells. The pаncreаs is below аnd behind the stomаch. Insulin is needed to move blood sugаr (glucose) into cells. Inside the cells, glucose is stored аnd lаter used for energy.
Under normаl circumstаnces, insulin functions in the following steps:
Your body breаks down the food you eаt into glucose (sugаr), which is your body’s mаin source of energy.Glucose enters your bloodstreаm, which signаls your pаncreаs to releаse insulin.Insulin helps glucose in your blood enter your muscle, fаt аnd liver cells so they cаn use it for energy or store it for lаter use.When glucose enters your cells аnd the levels in your bloodstreаm decreаse, it signаls your pаncreаs to stop producing insulin.Your question isn't well arranged, but most probably your options were
a. the pancreas is unable to produce enzymes to break down proteins.
b. the body is unable to respond to signals that indicate the amount of glucose in the blood.
c. appetite signals no longer regulate feeding.
d. cells in the bladder are no longer able to send signals when the bladder fills.
Thus, the correct option is B.
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how water moves from the xylem vessels in the leaves to the atmosphere surrounding the leaves of the plant
From the apex of the xylem vessels, water first enters the mesophyll cells. The water then escapes from the leaf's cells and condenses in the gaps between them.
What are the xylem vessels' functions?Water transportation from roots to other plant components is the primary purpose of the xylem. Additionally, Xylem offers mechanical strength. The basic components for conducting water are tracheids and vessels.
Why are xylem vessels made?Root hairs, vessels, hepatocytes, and fibers compensate xylem. Massive slots there in end walls between succeeding vessel parts, as well as large perforation plates, hold vessel elements together in files to form vessels.
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can you identify the steps in which the lagging strand is synthesized? to review dna replication, watch this microflix animation: dna replication. part a - lagging strand synthesis drag the labels onto the diagram to identify the stages in which the lagging strand is synthesized.
Yes, I can identify the steps in which the lagging strand is synthesized. DNA replication is essential for the storage and transmission of information to progeny cells.
In cells, DNA performs two fundamental tasks: the "blueprint" function and information storage and transmission (genes can be replicated and passed on to children)..
Components of replicating DNA strands.
A.Parental DNA
B. DNA polymerase
C. Leading strand
D. Lagging Strand
E. DNA ligase
F. Replication Fork
Here are the stages in which the lagging strand is synthesized.
1. By incorporating nucleotides into a brief RNA segment, DNA polymerase starts to synthesize the lagging strand.
2. Each component of the lagging stand is freed from DNA polymerase once it has been finished.
3. The RNA segments are replaced with DNA by a separate DNA polymerase.
4. DNA ligase fills in the spaces between the fragments to create a continuous strand.
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which of the following statements about fats in food is true? multiple choice fats affect the texture and taste, but not the smell, of foods. fats are the principal form of stored energy in the body. fats provide the major material for cell membranes. fats are a primary source of quick energy
Fats are the principal form of stored energy in the body. Option 2.
Fats as an energy sourceStored fats represent a major source of energy for cells. According to research findings, a gram of fat contains twice as much energy as a gram of carbohydrate. A gram of fat provides about 9 calories of energy while a gram of carbohydrates provides about 4 calories of energy for cells.
However, fats represent a slower source of energy for cells than carbohydrates. They are slower to digest and can take as much as 6 hours for digestion and transportation to the tissues that are in need of energy.
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What causes the release of calcium from the sarcoplasmic reticulum?
According to the when a cell is under stress, it can by releasing ca out of its endoplasmic reticulum.
Endoplasmic reticulum: What is it?
The outer membrane is a large combination of tubes membrane that is only found there in cytoplasm of eukaryotic cells. Endoplasmic reticulum: What is it? There are two types of endoplasmic reticulum: one has a surface covered in ribosomes, the other has a smooth surface.
What does the term "rough endoplasmic reticulum" mean?
The inner membrane is the latter, whereas the reticulum is the former. These membranes finally unite with the nuclear membrane's outer layer in a series of continuous folds. Other than sperm or red blood cells, its inner membrane is visible in all other types of cells.
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the stage of the growth curve where the bacteria are producing molecules necessary for cell division, but not undergoing cell division is called the ___________
The stage of the growth curve where the bacteria are producing molecules necessary for cell division, but not undergoing cell division is called the lag phase.
The lag phase is a time of adaptation during which the bacteria are becoming used to their new surroundings. Depending on how different the current conditions are from the ones the bacteria originated in as well as the state of the bacterial cells themselves, the length of the lag phase can range significantly. The four phases of a bacterial growth cycle are lag, exponential (log), stationary, and death. The bacterial growth curve shows the evolution of a bacterial population's live cell count over time. The development curve goes through four distinct phases: lag, exponential (log), stagnant, and death.
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Which statement about inbreeding is correct? ANSWER:Offspring produced by inbreeding have high biological fitness. Inbreeding increases the rate of purifying selection. Inbreeding changes allele frequencies in a Inbreeding increases random mating.population.
Inbreeding is the term used to describe relationships between people who are very closely related, such as siblings or parent-offspring.
When detrimental recessive alleles are expressed more frequently, inbreeding can impair fitness and raise the likelihood of genetic diseases in offspring. We call this inbreeding depression. Additionally, inbreeding decreases genetic variety within a population, which may limit its capacity to adapt to shifting environmental factors. On the other hand, inbreeding can also lead to the purifying selection of harmful genes and raise the expression of advantageous dominant alleles. In conclusion, inbreeding can affect a population's genetic diversity and fitness of offspring in both good and negative ways.
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Why is the Dutch Elm Disease not considered invasive to the Netherlands?
Answer: It is an invasive species that hurts trees.
Some organisms that exist today have been on Earth for millions of years, but they have evolved over time. Some of their traits have differed from their ancestors. Which of these is NOT a reason for why an organism would evolve?
A. new traits appearing in their DNA
B. the death of a single group of a species
C. shifts in the continents
D. changes in climate
Please explain why you chose this answer
The death of a single group of a species is not a reason why an organism would evolve. Hence, option B is correct.
What is evolution?Evolution is the shift in a biological population's heritable traits over successive generations. These traits are the expressions of genes, which are passed down through reproduction from parent to offspring.
Populations are thought to evolve mostly through natural selection. However, there are a number of additional mechanisms of evolution, such as gene flow, genetic drift, and mutation.
Therefore, option B is correct.
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At conditions of standard temperature and pressure, determine how many liters of hydrogen gas are produced by completely reacting a zinc nail with a mass of 2. 2g with an excess of hydrochloric acid.
0.75 liters of hydrogen gas would be produced by completely reacting 2.2 grams of a zinc nail with hydrochloric acid.
The reaction between zinc and hydrochloric acid produces hydrogen gas. To determine the number of liters of hydrogen gas produced, we need to know the balanced chemical equation for the reaction and the number of moles of zinc that react.
The balanced chemical equation is:
Zn + 2HCl → ZnCl2 + H2
Using the mass of zinc, we can calculate the number of moles:
n = m/M
where n is the number of moles, m is the mass of zinc (2.2 g), and M is the molar mass of zinc (65.38 g/mol).
n = 2.2 g / 65.38 g/mol = 0.0337 mol
Since one mole of hydrogen gas has a volume of 22.4 L at standard temperature and pressure (STP), the number of liters of hydrogen gas produced can be calculated:
V = n * 22.4 L/mol = 0.0337 mol * 22.4 L/mol = 0.75 L
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examine the strands of dna. what do you observe about the arrow ends of the model
These arrows in DNA's 2D representation show how the many genres are really employed. The genres are what derive the shape of RNA from DNA.
What is Rna and what does it do?The informational molecule is DNA. It contains data needed to make proteins, which are other big molecules. These directions are dispersed throughout 46 lengthy chromosome structures that are found within every one of your cells. Numerous smaller pieces of DNA, known as genes make up these chromosomes.
Where is the DNA managed to keep?cell plasma
The majority of DNA is found in the nucleus (where it is known as nuclear DNA), but there is also a tiny quantity of DNA in the mitochondrial
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